Mixing machine



G. H. PETRI. MIXING MACHINE. APPLICATION FILED ocr .12, 1920.

1,428,704. t nt d ept. 12, 1922.

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Patented Sept. 12, E922.

GUNTHER H. PETRI, OF BOSTON, MASSACHUSETTS.

MIXING MACHINE.

Application filed October 12, 1920. Serial No. 416,378.

To all whom it may concern:

' Be it known that I, GUNTHER H. PETRI, a citizen of the United States,residing atBoston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Mixing Machines, ofwhich the-following is a specification.

My invention relates to improvements in mixing machines. More.especially it pertains to the supporting means for a receptacle such asa can in which the ingredients to be. mixed are placed. It is desirableto support the mixing can so that it may be swung out of its mixingposition to a" position where it may be removed or replaced, oritscontents handled. It is also desirable to be able to swing the can fromthe machine in more than one direction, so that the latter may be placedin the most advantageous position with particular regard to the space,light, driving means, etc; and without being obliged to consider theremoval of the can in a specific direction from the machine. Ithasalready been proposed to hang the can holder on a pivot in order thatthe can may be swun to one side or the other of the machine. uch a pivotis naturally placed on a projection from the middle of the machine. Thishas never been satisfactory however, for the proximity of the pedestalthat supports the mixer driving machinery above limits the swing, unlessthe projection of the pivot be considerable; and if that be madeconsiderable, in order to get the needed swing there has to be a greatoverhang of the driving machinery above. And such a design produces bothincreased stresses and decreased strength in the "projecting parts onaccount of the increase of leverage. But otherwise the limit of swingsometimes hampers ready access to the can, when swung from mixingposition.

It is an object of my invention to provide a firm, compact construction,which is free from the above objections, and yet provides the advantagesabove indicated. This is accomplished by providing a plurality ofsupporting pivots for the can holder, which, in so far as they are closeto the pedestal are outside of the medial vertical plane passing throughthe pedestal and overhead driving mechanism. Any one of. these may beused, thus making it possible to set the machine most conveniently asregards availablespace and adjacent objects, and insuring that howeverit is set the cancan be swung clear of the machine to a position whereit may readily be removed. It is a further object of my invention to soconstruct the pivots that in addition to their functioning as an axisabout which the holder is swung into unloading and loading positionsthey also serve to lock the holder and give it rigidity when in mixingposition.

In the embodiment disclosed in the accompanying drawings, two pivots areshown at corners of the pedestal; and others might be provided elsewhere-without departing from the scope of my invention. It is intended thatthe patent shall cover by suitable expression in the appended claimswhatever features of patentable novelty exist in the inventiondisclosed.

In the drawings: I

Figure 1 is a side elevation, partly in medial section, of a mixingmachine showing a possible application of the invention.

Figure 2 is a plan diagram of certain details viewed as in section online 39 of Figure 1; showing the can holder in mixing position in fullline, and showing a portion of the can holder in varied swung positionsin dotted lines;

Figure 3 is a fragmentary View of a coupling pin which may performthe'function of a pivot and also look the can holder while the machineis in mixing operation.

Referring to the drawings, 1 is the vertical standard or pedestal of themachine, the lower part of which is provided with a base 2, extendingoutward from the standard to form a support 9 for a can holder 3provided with a plurality of bearing stems 40 which fit betweencooperating or mating abutments 4 and 5 on vertical standard 1, the

said bearings and abutments being drilled vertically to permit aconnecting or hinge pin 6, to be passed through them either to lock thecan holder to the standard or to act as a pivot about which the holdermay be swung away from the machine to a suitable unloading positions Adownward projection 8 of the can holder 3 rests on the supsign isremovably clamped on the end of a whip spindle 14 rotatably mounted in awhip driver 15, which is in the nature of p a crank, on the top end ofwhich spindle is rigidly mounted a driving gear 19. An internal gear 20,integral with an outwardly projecting part 7 of the vertical standard 1,serves to give rotation to the gear 19 as the latter rolls within it inan orbit around a vertical shaft 16, which is the crank shaft of andrigidly secured to the whip driver 15, and rotatably mounted in bearings17 and 18 of the projecting part 7. On shaft 16 is fixed a bevel gear 21which meshes with a. bevel pinion 22 pinned to a variable speed shaft23, mounted in bearings 25 and 26. Parallel with the variable speedshaft 23 is a constant speed shaft 24 journaled in bear ings 27 and 28,and having fixed thereon speed changing gears 29, 30, 31 and 32 ofdifferent sizes. These gears are in constant mesh with correspondingclutch gears 33, 34, 35 and 36 loosely mounted on the variable speedshaft 23.

Motive power may be applied to my improved mixing machine by anysuitable means, such as the pulley 38, which is secured to an extensionof shaft 24. Clutch mechanism of any suitable design, the details ofwhich are not shown in the drawing may be operated to throw either oneof two jaw clutches 41, which are splined to shaft 23, into drivingconnections with a clutch gear, thus driving shaft 23 at the desiredspeed, and, by means of the mechanism previously described, causing theheater to become active in the can 10. When the mixing operation hasbeen completed, the outside power is shut off, or the clutches 41 placedin the position shown, and the beater disconnected from its spindle 14,and removed from the can. The latter may then be swung clear of themachine by simply removing one .of the connecting pins 6, and swingingthe holder about the other pin 6 as an axis.

It is manifest that by using a plurality of pivots great rigidity of thecan holder is secured, since the pivots may be disposed about theperiphery of the holder, thereby supporting it so that each serves as abrace for the other and yet maybe the pivot on which the holder swings.By this positioning of the'pivots, the holder may be swung to eitherside of the pedestal with a full sweep away from the machine. Theposition which it can thus assume is more accmible than if but one pivotis provided for this same purpose, located next to the pedestal on thecentre line of the machine.

I claim as my invention:

1. In. mechanism for holding material and operating thereon, a pedestalfor the operating mechanism, combined with a receptacle holder having aplurality of pivots supported on the pedestal on different axes, and areceptacle supported by said holder adapted to hold the material onwhich said mechanism operates; each of said pivots being removablewhereby the holder and receptacle may be swung about another of them.

2. In mechanism for holding material and operating thereon, a pedestalfor the operating mechanism, combined with a receptacle holder having aplurality of pivotal supports located on different axes around thepedestal, and a receptacle mounted on said holder adapted to hold thematerial on which said mechanism operates; all of said supports beingadapted to be engaged; and each being adapted to be removed thuspermitting swinging about some other.

3. In mechanism for holding material and. operating thereon, a pedestalfor the operating mechanism, combined with a lurality of pivotssupported on the pedestal on different axes, and a receptacle adapted tobe supported on either of said pivots and to hold the material on whichsaid mechanism operates, in either of a plurality of positions whilesaid mechanism is operating thereon; each said pivot being removable,whereby the receptacle is supported on another pivot while socooperating with said mechanism in its said position.

4. A receptacle holder, adapted for use with a mixing machine or thelike, comprising a plurality of pivoted supports located in variousdirections from the axis of operation of the mixing machinery, on eitherof which supports the holder may be swung; there being means to lock theholder thereon, in position under said axis.

5. The combination with a standard for a mixing machine having a mixingreceptacle, of a holder for said receptacle comprising a plurality ofpivotal connections between said standard and said holder; each of saidconnections being disconnectable to permit the holder to be swung abouton another of said connections whereby the receptacle may be swung todifferent sides of the standard.

Signed at Boston, Massachusetts, this eleventh day of October, 1920.

GUNTHER H. PETRL

